s71ws512ne0bfwzz Meet Spansion Inc., s71ws512ne0bfwzz Datasheet - Page 71

• Manufacturer Part Number: s71ws512ne0bfwzz
• Description: Stacked Multi-chip Product Mcp Flash Memoy And Psram Cmos 1.8 Volt, Simultaneous Operation, Burst Mode Flash Memory And Pseudo-static Ram
• Manufacturer: Meet Spansion Inc.

Note:
changes to “1.” See the subsections on DQ6 and DQ2 for more information.
June 28, 2004 S71WS512NE0BFWZZ_00_A1
The system should recheck the toggle bit even if DQ5 = “1” because the toggle bit may stop toggling as DQ5
array data. If not all selected sectors are protected, the Embedded Erase algo-
rithm erases the unprotected sectors, and ignores the selected sectors that are
protected.
The system can use DQ6 and DQ2 together to determine whether a sector is ac-
tively erasing or is erase-suspended. When the device is actively erasing (that is,
the Embedded Erase algorithm is in progress), DQ6 toggles. When the device en-
ters the Erase Suspend mode, DQ6 stops toggling. However, the system must
also use DQ2 to determine which sectors are erasing or erase-suspended. Alter-
natively, the system can use DQ7 (see the subsection on DQ7: Data# Polling).
If a program address falls within a protected sector, DQ6 toggles for approxi-
mately 1 ms after the program command sequence is written, then returns to
reading array data.
DQ6 also toggles during the erase-suspend-program mode, and stops toggling
once the Embedded Program algorithm is complete.
See the following for additional information:
Figure 25
Toggle Bit I on DQ6 requires either OE# or CE# to be deasserted and reasserted
to show the change in state.
(toggle bit timing diagram), and
A d v a n c e
S29WSxxxN MirrorBit™ Flash Family For Multi-chip Products (MCP)
Figure 6. Toggle Bit Algorithm
No
I n f o r m a t i o n
Complete, Write
Read Byte Twice
Reset Command
Program/Erase
Operation Not
Address =VA
Address =VA
Address = VA
(DQ7–DQ0)
(DQ7–DQ0)
(DQ7–DQ0)
Read Byte
Read Byte
Toggle Bit
Toggle Bit
DQ5 = 1?
= Toggle?
= Toggle?
START
Yes
Yes
Yes
Table
Figure
Operation Complete
No
No
Program/Erase
19.
6,
"DQ6: Toggle Bit
I" section,
71